Mineral water is generally safe, but some people should be especially careful with product choice and quantity: those with hypertension, heart failure, or kidney disease (particularly with high-sodium waters), those with reflux/ulcer/gastritis (carbonation may worsen symptoms), and infants/children (high-mineral waters may not be appropriate as routine beverages). If you follow a salt-restricted diet, label reading is essential. The rule is simple: manage personal risk, product profile, and dose together.